I read once that the reason why people don't help other people who are hurt is because everyone is waiting someone else to go help him/her. Sooo that's why they don't have to risk themselves. There was some special term for this kind of behaviour and it's apparently quite common to people act this way. The guy who jumped was one of a hundred. Lesson learned here: Don't ever get hurt badly, because there will be lots of watchers and that one of a hundred -guy may not be nearby...